Neural network chip for ear-worn device

US12361259B2 · kind B2 · utility

Assignee

• Chromatic Inc. · US

Inventors

• Andrew J. Casper · Clinton, US
• Matthew de Jonge · Burlington, US
• Igor Lovchinsky · Cambridge, US
• Nicholas Morris · Brooklyn, US
• Jonathan Macoskey · Pittsburgh, US

Key dates

• Filing date: May 16, 2024
• Grant date: Jul 15, 2025
• Expiry date: May 16, 2044

Classification

• Technology area (CPC —): General

Abstract

A hearing aid may include a neural network chip having tiles arranged in an array, each tile including memory, 16-128 multiplier-accumulator circuits (MACs), and routing circuitry. The memory of each tile may be configured to store a portion of elements of a matrix A comprising weights of a recurrent neural network. Each tile may be configured to receive and store elements of an activation vector X, and all tiles in a column of the array may be configured to receive the same elements of X. The plurality of tiles may be configured to perform a matrix-vector multiplication A*X by performing multiply-and-accumulate sub-operations in parallel among the plurality of tiles. The routing circuitry from the tiles in each respective row of tiles may be configured to combine results of the multiply-and-accumulate sub-operations.